/*
 * Copyright (c) 2008-2012, Hazel Bilisim Ltd. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.hazelcast.impl.concurrentmap;

import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.core.HazelcastInstanceAware;
import com.hazelcast.impl.CMap;
import com.hazelcast.impl.FactoryImpl;
import com.hazelcast.nio.DataSerializable;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.concurrent.Callable;

public class MapSizeCallable implements Callable<Integer>, DataSerializable, HazelcastInstanceAware {
    private int partitionVersion;
    private String mapName;
    private transient HazelcastInstance hazelcast;

    public MapSizeCallable(String mapName, int partitionVersion) {
        this.mapName = mapName;
        this.partitionVersion = partitionVersion;
    }

    public MapSizeCallable() {
    }

    public Integer call() throws Exception {
        FactoryImpl factory = (FactoryImpl) hazelcast;
        CMap cmap = factory.node.concurrentMapManager.getMap(mapName);
        if (cmap == null) return 0;
        return cmap.size(partitionVersion);
    }

    public void writeData(DataOutput out) throws IOException {
        out.writeUTF(mapName);
        out.writeInt(partitionVersion);
    }

    public void readData(DataInput in) throws IOException {
        mapName = in.readUTF();
        partitionVersion = in.readInt();
    }

    public void setHazelcastInstance(HazelcastInstance hazelcastInstance) {
        this.hazelcast = hazelcastInstance;
    }
}